Laplace transform Markovian arrival process Monte Carlo advanced measurement approach aggregate discounted claims aggregate risk archimedean copulas background risk central limit theorem clustering collective risk model concomitant confidence interval constant interest rate copula copulas covariance cumulative Parisian ruin discounted aggregate claims dual risk model financial time series hazard model individual risk model information processing insurance integral equation max-stable random fields maximal tail dependence multiplicative background risk model multivariate gamma distribution